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Lenovo UEFI Diagnostics - Bootable USB is a tool that can be booted by itself and tests hardware devices in Lenovo UEFI-enabled ThinkPad, ThinkCentre, ThinkStation and ThinkServer systems.
Lenovo UEFI Bootable Generator GUI version is a tool runs on Windows platform with Graphic User Interface to create Lenovo UEFI Diagnostics - Bootable USB.
Lenovo UEFI Bootable Generator CMD version is a tool runs on Windows platform with Command Line to create Lenovo UEFI Diagnostics - Bootable USB.
Once Lenovo UEFI Diagnostics - Bootable USB is created, it can be used on your Lenovo computer regardless of what OS your system has as long as your system BIOS supports UEFI environment.

Note:

You will need the following files to complete this task:

To use GUI approach

uefi-bootable-generator-gui-xxx.zip, which contains bootable generator GUI version that generates the bootable key.